Low-Pressure Reverse Osmosis Pretreatment for Distiller Feedwater,
Abstract
A program is being conducted to investigate new concepts to improve shipboard distiller performance. One phase of this program is aimed at exploring the potential of low-pressure RO* membranes for selective removal of scale-forming salts from seawater as a pretreatment for distiller feedwater. This report describes an investigation which consisted of the determination of the critical performance characteristics of specially prepared RO membranes designed for low-pressure operation. The characteristics evaluated were hardness ion rejection (Ca(++) and Mg(++)), sulfate SO4(-2) ion rejection, TDS rejection, product water flux, and recovery. These characteristics were investigated over the range of 80-300 psig. Initial membrane screening was done on flat membrane specimens, followed by evaluation of a single 60 sq ft spiral-wound module. Following this work, evaluations were conducted on a six-module staged system containing 90 sq ft of membrane surface.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1975
- Accession Number
- ADA015081
Entities
People
- David W Taylor
- W. Dudley